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Answered

3sur4+2sur5=  7sur3-2sur7  -2sur5+1sur3=  5sur4+-7sur6=  4sur-9-5sur6= 3sur16-1sur12=

Sagot :

WINKA54

1)15/20+8/20=23/20

2)21/21-6/21=15/21

3)-6/15+5/15=-1/15

4)30/24-28/24=2/24 soit 1/12

5)24/54-45/54=-21/54

6)36/192-16/192=20/192 soit 5/48

 

voila

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